Mid-Ohio Sports Car Course is a two-and-a-quarter mile road course in Lexington, Ohio. It is noted for being the final venue to host an event of the original United States Road Racing Championship as well as the final venue for the revived series. Formula One legend Jackie Stewart won his first Can Am Series victory there in 1971. Datsun won their first Trans Am Series victory there in 1971. In 1972, Pontiac won their only Trans Am race during the series' golden era at Mid-Ohio. In recent years, NASCAR's support series have begun using Mid-Ohio. Recently, Mid-Ohio has been one of only three road courses on the IndyCar Series schedule along with Sonoma Raceway and Barber Motorsports Park. The ICS tends to prefer a mix of oval and street circuits.

The original configuration featured a chicane right before the modern turn two hairpin. The chicane was removed to create a passing zone.

Mid-Ohio was the first circuit to host an IMSA GT Championship endurance event, with IMSA racing for six hours there in 1972.

Mid-Ohio was a regular on the Formula 5000 schedule for several years, with John Redman winning most events.

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